Absorb your fourth Boss Stem Cell

Completed Osvald's story.

Brought along four townspeople at once.

Completed Partitio's story.

Gleaned information from 100 townspeople.

Complete the Chicken Thief quest

Complete the Mariachi Band quest

Destroy the Remnant in the Crater

Activate Cyd

Finish the game with two Boss Stem Cells active

Reach the Crown for the first time!

Hit the same enemy with 5 orbiting Bibles in short succession.